Abstract
The neutron spectra of one outer (#10) and two inner (#2 and #3) sites of the Dalhousie University SLOWPOKE-2 reactor (DUSR) have been calibrated for the k0-based neutron activation analysis (k0-NAA). The parameters determined include the cadmium ratio (RCd), epithermal neutron flux shape factor (α), subcadmium-to-epithermal neutron flux ratio (f), thermal-to-fast neutron flux ratio (fF), modified spectral index r(α)(Tn/T0)1/2, Westcott gLu(Tn)-factor, and absolute neutron temperature (Tn). The a-values of -0.0098±0.0045 and -0.0425±0.0047 and -0.0422±0.0053 and f-values of 57.1±2.2 and 18.8±0.4 and 18.9±0.4 were obtained for the sites #10, #2 and #3, respectively. The modified spectral index (MSI), gLu(Tn)-factor, and Tn have been determined for the handling of ‘non 1/v’ (n,γ) reactions. The accuracy of the method was evaluated by analyzing reference materials.
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